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Q: What is the effect of size on diffusion? Concentration? Temperature?
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Q: Using appropriate examples, distinguish between passivetransport and facilitated diffusion.
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Q: does the rate of diffusion correspond with the molecular weight of the dye?
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Q: What is the principle behind the Diffusion experiment?
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what is the difference between dilution and diffusion methods? Which do you think gives more reproducible results? Explain.
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- What is the principle behind the Diffusion experiment?What are the effects of the different agar concentrations, the temperature, and the dye types on the rate of diffusion? How do these factors mediate in the observed diffusion?How is the rate of diffusion affected by an increasedconcentration gradient? By increased temperature of asolution? By increased viscosity of the solvent?
- The experiment described in Figure 11-16 was performed at 37 °C. If the experiment were carried out at 10 °C, what effect would you expect on the rate of diffusion? Why?If the bacteria within your medium suddenly die, can an alteration in osmotic balance be the reason why?What advantages are there to using diffusion as a transport mechanism versus active transport of a substance?
- Discuss why the following affect the rate of diffusion:molecular size, temperature, solution density, and thedistance that must be traveled.Explain how to conduct a Kirby-Bauer disk diffusion test. Include all of the steps involved.You have 3 cubes, A, B, and C. They have surface to volume ratios of 3:1, 5:2, and 4:1 respectively. Which of these cubes is going to be the most effective at maximizing diffusion, how do you know that?